JP2004202610A - Recessed part cover - Google Patents

Recessed part cover Download PDF

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Publication number
JP2004202610A
JP2004202610A JP2002372990A JP2002372990A JP2004202610A JP 2004202610 A JP2004202610 A JP 2004202610A JP 2002372990 A JP2002372990 A JP 2002372990A JP 2002372990 A JP2002372990 A JP 2002372990A JP 2004202610 A JP2004202610 A JP 2004202610A
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Japan
Prior art keywords
distance
groove
cover
extension
recess
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JP2002372990A
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Japanese (ja)
Inventor
Takeshi Komine
毅 小峰
Goji Yamamoto
剛司 山本
Hirokazu Suruga
宏和 駿河
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Big Alpha Co Ltd
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Big Alpha Co Ltd
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Priority to JP2002372990A priority Critical patent/JP2004202610A/en
Priority to US10/741,378 priority patent/US7144209B2/en
Publication of JP2004202610A publication Critical patent/JP2004202610A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30392—Milling with means to protect operative or machine [e.g., guard, safety device, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/219—Guards

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recessed part cover easily installable in a recessed part, and stably fixable to the recessed part even if a tolerance width and a dimensional error of the recessed part such as a groove and a hole and the recessed part cover for covering the recessed part are large. <P>SOLUTION: This recessed part cover has a top plate 11 for covering the recessed part, and a pair of pressing parts 12A and 12B extending from the top plate 11, inserted into the recessed part and pressing side walls 52A and 52B of the recessed part. The base ends 15A and 15B of the pressing parts 12A and 12B are arranged on the top plate 11 in a position for narrowing a mutual interval more than a distance W between the side wall 52A and the side wall 52B. A part of extension parts 16A and 16B of the pressing parts 12A and 12B is protrusively formed outside up to a position wider than the distance W. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【発明が属する技術分野】
本発明は、工作機械に形成された溝や穴等の凹部を覆うための凹部用カバーに関する。
【従来の技術】
従来から、工作機械に形成された溝穴を覆うための溝穴用カバーが種々提案されている。
例えば、特開昭５７−１７８６３９号公報には、フライス盤、ボール盤、形削り盤、平削り盤、中ぐり盤等の工作機械用で、穴を押抜いた平らな上部ウエブと、この上部ウエブから２つの平行する案内枝部が下方に延びている案内枝部と、からなるＴ溝ガードが開示されている。（特許文献１）。
また、意匠登録５８３８３６号公報には、工作機械テーブルに設けられている溝穴を覆い、加工中に発生する切粉や、工具等が、前記溝穴に落ち込むことを防止する工作機械テーブル用溝穴カバーが提案されている。この工作機械テーブル用溝穴カバーは、溝穴を覆う天板と、天板から垂直に立設された一対の脚部を備え、断面が略コ字状を有している。前記脚部の先端は、脚部より外側に若干突出している。（意匠登録文献１参照）。
この意匠登録公報に記載された工作機械テーブル用溝穴カバーは、脚部を溝穴に挿入して天板で溝穴を塞ぐ（覆う）ものである。この工作機械テーブル用溝穴カバーは、溝穴に脚部が挿入された際に、当該脚部の先端に形成されている突出部が溝穴の側壁に当接させることで、溝穴に対し固定させている。
【特許文献１】
特開昭５７−１７８６３９号公報
【意匠登録文献１】
意匠登録５８３８３６号公報
【発明が解決しようとする課題】
しかしながら、前述した公報に記載されたＴ溝ガード及び溝穴カバーは、案内枝部（脚部）が上部ウエブ（天板）から垂直に立設されているため、溝穴の幅寸法の公差幅に対する許容を大きくすることが困難である。したがって、前記公差幅が大きな溝穴に、前記Ｔ溝ガードまたは溝穴カバーを取付ける場合、これらの溝穴に対する固定状態に大きな差が生じる虞がある。また、Ｔ溝ガードや溝穴カバーを製造する上で、寸法精度の公差幅が大きい場合も、前記溝穴に対する固定状態に大きな差が生じる虞がある。
本発明は、このような従来の問題点を解決することを課題とするものであり、溝や穴等の凹部や、当該凹部を覆うための凹部用カバーの公差幅や寸法誤差が大きくても、凹部に取付けやすく、かつ安定して凹部に固定できる凹部用カバーを提供することを目的とする。
【課題を解決するための手段】
この目的を達成するため、本発明は、工作機械に形成された凹部を覆うための凹部用カバーであって、前記凹部を覆う天板と、前記天板から延出し、前記凹部に挿入されて当該凹部の側壁を押圧する一対の押圧部と、を備え、前記一対の押圧部の基端は、互いの間隔が前記押圧される側壁間の距離より狭くなる位置で前記天板に設けられ、当該一対の押圧部の延出部の一部は、前記側壁間の距離より広い位置まで外側に突出形成されている凹部用カバーを提供するものである。
この構成を備えた凹部用カバーは、一対の押圧部の延出部の一部が、前記側壁間の距離より広い位置まで外側に突出形成されているが、この凹部用カバーを凹部に挿入させる際には、これを傾ければ凹部内に挿入できる。そして、前記両延出部は、凹部内に挿入されると、その弾性力によって、凹部の側壁を押圧する。このため、前記凹部や、当該凹部を覆うための凹部用カバーの公差幅や寸法誤差が、ある程度大きくても、凹部用カバーを前記凹部に容易に取付けることができ、また安定して凹部に固定することができる。
前記一対の押圧部は、前記延出部の先端近傍において互いの間隔が前記側壁間の距離より広い位置となるよう、互いに離間させることができる。
また、前記一対の押圧部は、一方の押圧部の基端と延出部の最外突出部とを結ぶ第１の線と、他方の押圧部の基端と延出部の最外突出部とを結ぶ第２の線が、２０度以上、３０度以下の角度をもって交差するよう構成することもできる。
そしてまた、前記一方の延出部の最外突出部と、前記他方の延出部の最外突出部との距離の最小許容寸法は、前記凹部の最大許容寸法よりも大きくなるよう構成することができる。
そしてまた、本発明にかかる凹部用カバーは、前記凹部の側壁間の距離Ｗと、前記一方の延出部の最外突出部と、前記他方の延出部の最外突出部との距離Ｌと、前記一方の押圧部の基端と延出部の最外突出部とを結ぶ第１の線と、前記他方の押圧部の基端と延出部の最外突出部とを結ぶ第２の線とがなす角度θとが、以下に示す数式１を満たすよう構成することができる。
Ｗ≧Ｌ・cos（θ／２） 数式１
但し、Ｗ＜Ｌ
また、本発明にかかる凹部用カバーは、前記天板に、凹部溝カバーを前記凹部から取外すための取外具が係合する係合部を形成することができる。このように構成することで、凹部溝カバーを凹部から、さらに簡単に取外すことができる。また、前記係合部は、前記天板に形成された小穴から構成することができる。
そしてまた、前記凹部は、加工物を保持するテーブルに形成されたＴ溝とすることができる。
【発明の実施の形態】
次に、本発明の好適な実施の形態にかかる凹部用溝カバーについて、図面を参照して説明する。なお、以下に記載される実施の形態１及び２は、本発明を説明するための例示であり、本発明をこれらの実施形態にのみ限定するものではない。したがって、本発明は、その要旨を逸脱しない限り、様々な形態で実施することができる。
（実施の形態１）
図１は、本発明の実施の形態１にかかる凹部用溝カバー（以下、「溝カバー」という）の斜視図、図２は、図１に示す溝カバーの拡大正面図、図３は、図１に示す溝カバーをＴ溝に取付ける途中の状態を示す拡大断面図、図４は、図１に示す溝カバーをＴ溝に取付けた状態を示す拡大断面図、図５は、図１に示す溝カバーをＴ溝から取外す途中の状態を示す拡大断面図である。
図１〜図５に示すように、実施の形態１にかかる溝カバー１は、工作機械のＴ溝５０を覆う天板１１と、天板１１の下面から延出した一対の押圧部１２Ａ及び１２Ｂを備えて構成されている。
天板１１の上面であって、Ｔ溝５０の長さ方向に沿った両側には、凸状縁部１３Ａ及び１３Ｂが形成されている。天板１１の下面のＴ溝５０の長さ方向に沿った両側には、Ｔ溝５０のエッジ部５１Ａ及び５１Ｂに相補した形状の勾配部１４Ａ及び１４Ｂが形成されている。また、天板１１には、Ｔ溝５０に取付けられた溝カバー１をＴ溝５０から取外すための取外具１００（図５参照）が係合する係合部としての小穴２０が数カ所開口されている。この小穴２０は、ワークの加工中に発生する切粉や、工具等が、Ｔ溝５０内に侵入することが無いサイズで構成されている。
一対の押圧部１２Ａ及び１２Ｂは、溝カバー１の中心線Ｏ１（図２参照）に対し線対称に形成され、正面から見て略ハ字状を備えている。この押圧部１２Ａ及び１２Ｂは、Ｔ溝５０に挿入されてＴ溝５０の側壁５２Ａ及び５２Ｂを、各々押圧する。（図４参照）。押圧部１２Ａ及び１２Ｂの基端１５Ａ及び１５Ｂは、押圧部１２Ａ及び１２Ｂの互いの間隔が、側壁５２Ａと５２Ｂとの間の距離Ｗ（図４参照）より狭くなる位置で、天板１１の下面に設けられている。すなわち、押圧部１２Ａの基端１５Ａの外側から押圧部１２Ｂの基端１５Ｂの外側までの距離Ｃ（図２及び図４参照）は、側壁５２Ａと５２Ｂとの間の距離Ｗより短く（Ｗ＞Ｃ）なっている。
押圧部１２Ａ及び１２Ｂの、天板１１から延出した延出部１６Ａ及び１６Ｂの最先端部１８Ａ及び１８Ｂは、互いに向き合うように内側に曲げられている。この押圧部１２Ａ及び１２Ｂは、外力が加えられた際に、延出部１６Ａ及び１６Ｂが互いに近づく方向に弾性変形可能となっている。
最先端部１８Ａ及び１８Ｂに隣接した延出部１６Ａ及び１６Ｂの先端側は、側壁５２Ａと５２Ｂとの間の距離Ｗより広い位置まで外側に突出形成されている。すなわち、延出部１６Ａ及び１６Ｂは、先端側において互いの間隔が前記距離Ｗより広い位置となるよう、互いに離間しており、延出部１６Ａの最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの距離Ｌ（図２参照）は、距離Ｗより長く（Ｌ＞Ｗ）なっている。また、図２に示すように、最外突出部１７Ａと基端１５Ａとを結ぶ第１の線ＬＡと、最外突出部１７Ｂと基端１５Ｂとを結ぶ第２の線ＬＢは、角度θ（２０°≦θ≦３０°）をもって交差するよう構成されている。
この延出部１６Ａの最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの距離Ｌの最小許容寸法は、Ｔ溝５０の側壁５２Ａと５２Ｂとの間の距離Ｗの最大許容寸法よりも大きく構成されている。具体的には、例えば、Ｔ溝５０の側壁５２Ａと５２Ｂとの間の寸法（距離Ｗ）が、溝の製作に必要な公差を含め、１８．０±０．２ｍｍの場合、Ｔ溝５０の最大許容寸法は、１８．２ｍｍである。一方、溝カバー１のアルミ押出し形成による製作に必要な公差が±０．２ｍｍの場合、最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの寸法（距離Ｌ）の最小許容寸法は、Ｘ−０．２ｍｍである。この最小許容寸法（Ｘ−０．２ｍｍ）と、Ｔ溝５０の最大許容寸法（１８．２ｍｍ）との関係は、
（Ｘ−０．２ｍｍ）＞１８．２ｍｍ
であるから、
Ｘ＞１８．４ｍｍ
となる。これより、上記条件の場合、最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの距離Ｌは、１８．４ｍｍより大きく設定されることになる。また、前記距離Ｗ、距離Ｌ、及び角度θの関係は、以下に示す数式１を満たしている。
Ｗ≧Ｌ・cos（θ／２） 数式１
但し、Ｗ＜Ｌ
次に、実施の形態１にかかる溝カバー１の具体的動作について説明する。
Ｔ溝５０に溝カバー１を取付けて、Ｔ溝５０の開口部を覆うには、先ず、Ｔ溝５０の開口部に対し、溝カバー１を傾けながら延出部１６Ａ及び１６ＢをＴ溝５０内に挿入する。（図３参照）。次に、溝カバー１の天板１１が水平になるように、溝カバー１をＴ溝５０に押し込む。この時、延出部１６Ａの最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの距離Ｌは、側壁５２Ａと５２Ｂとの間の距離Ｗより大きく設計されているため、延出部１６Ａ及び１６Ｂは、側壁５２Ａ及び５２Ｂに押されて、前記距離Ｌを縮める方向に弾性変形されながら、Ｔ溝５０内に押し込まれ、天板１１でＴ溝５０の開口部を覆う。（図４参照）。Ｔ溝５０内に押し込まれ、図４に示す状態になった溝カバー１の延出部１６Ａ及び１６Ｂは、その弾性復元力によって、Ｔ溝５０の側壁５２Ａ及び５２Ｂを押圧するため、溝カバー１は、Ｔ溝５０に確実に固定される。また、天板１１の下面には、Ｔ溝５０のエッジ部５１Ａ及び５１Ｂに相補した形状の勾配部１４Ａ及び１４Ｂが形成されているため、さらに安定してＴ溝に固定されると共に、Ｔ溝５０の開口部を確実に覆う（カバーする）ことができる。このように、溝カバー１で工作機械に形成されたＴ溝５０を覆うことで、加工中に発生する切粉や、工具等が、前記溝穴に落ち込むことを防止することができ、作業効率を向上することができる。
Ｔ溝５０から溝カバー１を取外す際は、図５に示すように、天板１１に形成されている小穴２０に、溝カバー１を取外すための取外具１００の先端を挿入して係合させ、溝カバー１をＴ溝５０から引っ張り出せば、簡単に取外すことができる。
なお、実施の形態１では、凹部用カバーとして溝カバー１を用い、この溝カバー１でＴ溝５０を覆う場合について説明したが、これに限らず、本発明にかかる凹部用カバーは、工作機械に形成された他の形状の溝や穴等を覆うように、天板１１の形状、長さ、幅等や、押圧部１２Ａ及び１２Ｂの基端１５Ａ及び１５Ｂの設置位置、延出部１６Ａ及び１６Ｂの長さや前記距離Ｌ等を任意に設定することができる。但し、いずれの場合であっても、前記基端１５Ａ及び１５Ｂは、互いの間隔が凹部（例えば、Ｔ溝５０）の側壁間の距離Ｗより狭くなる位置で天板１１に設けられ、延出部１６Ａの最外突出部１７Ａから延出部１６Ｂの最外突出部１７Ｂまでの距離Ｌが、前記距離Ｗより広いという条件を満たすものである。
また、実施の形態１では、押圧部１２Ａ及び１２Ｂを、それぞれ１枚の連続した略板状部材から構成したが、例えば、図６に示すように、複数の押圧部１１２Ａ（１１２Ｂ）を天板１１の長さ方向に沿って、互いに間隔をおいて配設してもよい。
また、天板１１に形成した小穴２０は、例えば、凸状縁部１３Ａまたは１３Ｂのいずれか側に寄った位置に形成する等、任意の位置に形成することができる。（実施の形態２）
次に、本発明の実施の形態２にかかる溝カバーについて図面を参照して説明する。
図７は、実施の形態２にかかる溝カバーの正面図、図８は、図７に示す溝カバーをＴ溝に取付ける途中の状態を示す断面図、図９は、図７に示す溝カバーをＴ溝に取付けた状態を示す断面図である。
なお、実施の形態２では、実施の形態１で説明した部材には、同一の符号を付し、その詳細な説明は省略する。
図７〜図９に示すように、実施の形態２にかかる溝カバー２の、実施の形態１にかかる溝カバー１と異なる主な点は、押圧部２２Ａ及び２２Ｂの構成要素である延出部２６Ａ及び２６Ｂの形状である。
すなわち、押圧部２２Ａ及び２２Ｂは、溝カバー１の中心線Ｏ１（図７参照）に対し線対称に形成され、正面から見て、延出部２６Ａ及び２６Ｂの略中央部まで互いに平行に形成され、この平行部分に連続して略ハ字状に、互いに離間した形状を備えている。この押圧部２２Ａ及び２２Ｂも、押圧部１２Ａ及び１２Ｂと同様に、Ｔ溝５０に挿入されて側壁５２Ａ及び５２Ｂを各々押圧する。また、押圧部２２Ａ及び２２Ｂの基端１５Ａ及び１５Ｂは、押圧部１２Ａ及び１２Ｂと同様に、押圧部２２Ａ及び２２Ｂの互いの間隔が、側壁５２Ａと５２Ｂとの間の距離Ｗ（図９参照）より狭くなる位置で、天板１１の下面に設けられている。すなわち、押圧部２２Ａの基端１５Ａの外側から押圧部２２Ｂの基端１５Ｂの外側までの距離Ｃ（図９参照）は、側壁５２Ａと５２Ｂとの間の距離Ｗより短く（Ｗ＞Ｃ）なっている。
延出部２６Ａ及び２６Ｂの略ハ字状の部分は、側壁５２Ａと５２Ｂとの間の距離Ｗより広い位置まで外側に突出形成されている。すなわち、延出部２６Ａ及び２６Ｂの最外突出部１７Ａから延出部２６Ｂの最外突出部１７Ｂまでの距離Ｌ（図７参照）は、距離Ｗより長く（Ｌ＞Ｗ）なっている。また、図７に示すように、最外突出部１７Ａと基端１５Ａとを結ぶ第１の線ＬＡと、最外突出部１７Ｂと基端１５Ｂとを結ぶ第２の線ＬＢは、角度θ（２０°≦θ≦３０°）をもって交差するよう構成されている。
また、溝カバー２も溝カバー１と同様に、延出部２６Ａの最外突出部１７Ａから延出部２６Ｂの最外突出部１７Ｂまでの距離Ｌの最小許容寸法は、Ｔ溝５０の側壁５２Ａと５２Ｂとの間の距離Ｗの最大許容寸法よりも大きく構成されている。さらに、前記距離Ｗ、距離Ｌ、及び角度θの関係は、前述した数式１（但し、Ｗ＜Ｌ）を満たしている。
なお、実施の形態２にかかる溝カバー２も、実施の形態１にかかる溝カバー１と同様にＴ溝５０に取付けて、Ｔ溝５０の開口部を覆うことができる。この時、延出部２６Ａ及び２６Ｂは、側壁５２Ａ及び５２Ｂに押されて、前記距離Ｌを縮める方向に弾性変形されながら、Ｔ溝５０内に押し込まれ、天板１１でＴ溝５０の開口部を覆う。（図９参照）。Ｔ溝５０内に押し込まれ、図９に示す状態になった溝カバー１の延出部２６Ａ及び２６Ｂは、その弾性復元力によって、Ｔ溝５０の側壁５２Ａ及び５２Ｂを押圧するため、溝カバー２は、Ｔ溝５０に確実に固定される。また、Ｔ溝５０から溝カバー２を取外す際も、実施の形態１と同様に行えばよい。
【発明の効果】
以上説明したように、本発明にかかる凹部用カバーは、一対の押圧部の延出部の一部が、凹部の側壁間の距離より広い位置まで外側に突出形成されているが、この凹部用カバーを凹部に挿入させる際には、これを傾ければ凹部内に挿入できる。そして、前記両延出部は、凹部内に挿入されると、その弾性力によって、凹部の側壁を押圧することができる。この結果、前記凹部や、当該凹部を覆うための凹部用カバーの公差幅や寸法誤差がある程度大きくても、凹部用カバーを前記凹部に容易に取付けることができ、また安定して凹部に固定することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態１にかかる凹部用溝カバーの斜視図である。
【図２】図１に示す溝カバーの拡大正面図である。
【図３】図１に示す溝カバーをＴ溝に取付ける途中の状態を示す拡大断面図である。
【図４】図１に示す溝カバーをＴ溝に取付けた状態を示す拡大断面図である。
【図５】図１に示す溝カバーをＴ溝から取外す途中の状態を示す拡大断面図である。
【図６】本発明の他の実施の形態にかかる溝カバーの斜視図である。
【図７】本発明の実施の形態２にかかる溝カバーの正面図である。
【図８】図７に示す溝カバーをＴ溝に取付ける途中の状態を示す断面図である。
【図９】図７に示す溝カバーをＴ溝に取付けた状態を示す断面図である。
【符号の説明】
１、２ 溝カバー
１１ 天板
１２Ａ、１２Ｂ、２２Ａ、２２Ｂ 押圧部
１５Ａ、１５Ｂ 基端
１６Ａ、１６Ｂ、２６Ａ、２６Ｂ 延出部
１７Ａ、１７Ｂ 最外突出部
５０ Ｔ溝
５２Ａ、５２Ｂ 側壁TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recess cover for covering a recess such as a groove or a hole formed in a machine tool.
[Prior art]
2. Description of the Related Art Conventionally, various types of slot cover for covering a slot formed in a machine tool have been proposed.
For example, Japanese Unexamined Patent Publication (Kokai) No. 57-178639 discloses a flat upper web having holes punched out for a machine tool such as a milling machine, a drilling machine, a shaping machine, a planing machine, a boring machine, and the like. There is disclosed a T-groove guard consisting of a guide branch with two parallel guide branches extending downward. (Patent Document 1).
Further, Japanese Patent No. 583836 discloses a groove for a machine tool table that covers a groove provided in a machine tool table and prevents chips, tools, and the like generated during machining from falling into the groove. Hole covers have been proposed. The slot cover for a machine tool table includes a top plate that covers the slots, and a pair of legs that stand vertically from the top plate, and has a substantially U-shaped cross section. The tip of the leg part slightly protrudes outside the leg part. (See Design Registration Document 1).
The slot cover for a machine tool table described in this design registration publication inserts a leg into the slot and closes (covers) the slot with a top plate. This slot cover for a machine tool table is configured such that when a leg is inserted into the slot, the protrusion formed at the tip of the leg abuts against the side wall of the slot. It is fixed.
[Patent Document 1]
Japanese Patent Application Laid-Open No. 57-178639 [Design Registration Document 1]
Design Registration No. 583836 [Problems to be Solved by the Invention]
However, in the T-slot guard and the slot cover described in the above-mentioned publication, the guide branch portion (leg portion) is erected perpendicularly from the upper web (top plate), so that the tolerance width of the slot width dimension is set. It is difficult to increase the tolerance for Therefore, when the T-slot guard or the slot cover is attached to the slot having a large tolerance width, there is a possibility that a large difference occurs in a state of fixing to the slots. Also, when manufacturing the T-slot guard and the slot cover, if the tolerance width of the dimensional accuracy is large, there is a possibility that a large difference occurs in the fixing state to the slot.
An object of the present invention is to solve such a conventional problem. Even if the tolerance width or dimensional error of a concave portion such as a groove or a hole or a concave portion cover for covering the concave portion is large. An object of the present invention is to provide a cover for a concave portion which can be easily attached to the concave portion and can be stably fixed to the concave portion.
[Means for Solving the Problems]
In order to achieve this object, the present invention is a concave portion cover for covering a concave portion formed in a machine tool, a top plate covering the concave portion, extending from the top plate, and inserted into the concave portion. A pair of pressing portions for pressing the side wall of the concave portion, and the base ends of the pair of pressing portions are provided on the top plate at a position where the distance between the pressing portions is smaller than the distance between the pressed side walls, A part of the extending portion of the pair of pressing portions provides a cover for the concave portion which is formed to protrude outward to a position wider than the distance between the side walls.
In the concave portion cover having this configuration, a part of the extended portion of the pair of pressing portions is formed to protrude outward to a position wider than the distance between the side walls, and the concave portion cover is inserted into the concave portion. At this time, if this is inclined, it can be inserted into the recess. When the extension portions are inserted into the recesses, the elastic portions press the side walls of the recesses. For this reason, even if the tolerance width and the dimensional error of the concave portion and the concave portion cover for covering the concave portion are somewhat large, the concave portion cover can be easily attached to the concave portion and stably fixed to the concave portion. can do.
The pair of pressing portions may be separated from each other such that a distance between the pressing portions near the distal end of the extending portion is wider than a distance between the side walls.
In addition, the pair of pressing portions includes a first line connecting a base end of one pressing portion and an outermost protruding portion of the extending portion, and a base line of the other pressing portion and an outermost protruding portion of the extending portion. May be configured to intersect at an angle of not less than 20 degrees and not more than 30 degrees.
Further, the minimum allowable dimension of the distance between the outermost projection of the one extension and the outermost projection of the other extension is configured to be larger than the maximum allowable dimension of the recess. Can be.
In addition, the concave portion cover according to the present invention includes a distance W between a side wall of the concave portion, a distance L between an outermost projecting portion of the one extending portion, and an outermost projecting portion of the other extending portion. A first line connecting the base end of the one pressing portion and the outermost protrusion of the extension, and a second line connecting the base end of the other pressing portion and the outermost protrusion of the extension. Can be configured so that the angle θ formed with the line satisfies Equation 1 shown below.
W ≧ L · cos (θ / 2) Formula 1
However, W <L
Further, in the concave portion cover according to the present invention, the top plate may be formed with an engaging portion with which a removing tool for removing the concave groove cover from the concave portion is engaged. With this configuration, the concave groove cover can be more easily removed from the concave portion. Further, the engagement portion may be constituted by a small hole formed in the top plate.
Further, the recess may be a T-groove formed in a table for holding a workpiece.
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a concave groove cover according to a preferred embodiment of the present invention will be described with reference to the drawings. Embodiments 1 and 2 described below are exemplifications for describing the present invention, and the present invention is not limited only to these embodiments. Therefore, the present invention can be implemented in various modes without departing from the gist thereof.
(Embodiment 1)
FIG. 1 is a perspective view of a groove cover for a concave portion (hereinafter, referred to as a “groove cover”) according to a first embodiment of the present invention, FIG. 2 is an enlarged front view of the groove cover shown in FIG. 1, and FIG. 1 is an enlarged sectional view showing a state in which the groove cover shown in FIG. 1 is being attached to the T groove, FIG. 4 is an enlarged sectional view showing a state in which the groove cover shown in FIG. 1 is attached to the T groove, and FIG. It is an expanded sectional view showing the state in the middle of removing a slot cover from a T slot.
As shown in FIGS. 1 to 5, the groove cover 1 according to the first embodiment includes a top plate 11 that covers the T groove 50 of the machine tool, and a pair of pressing portions 12 </ b> A and 12 </ b> B extending from the lower surface of the top plate 11. It is configured with.
Convex edges 13A and 13B are formed on the upper surface of the top plate 11 on both sides along the length direction of the T groove 50. On both sides of the lower surface of the top plate 11 along the length direction of the T-groove 50, slope portions 14A and 14B having shapes complementary to the edge portions 51A and 51B of the T-groove 50 are formed. The top plate 11 has several small holes 20 as engagement portions with which a detaching tool 100 (see FIG. 5) for removing the groove cover 1 attached to the T groove 50 from the T groove 50 is opened. ing. The small holes 20 are configured to have a size such that chips, tools, and the like generated during processing of the work do not enter the T-groove 50.
The pair of pressing portions 12A and 12B are formed symmetrically with respect to the center line O 1 of the groove cover 1 (see FIG. 2), and have a substantially C shape when viewed from the front. The pressing portions 12A and 12B are inserted into the T groove 50 and press the side walls 52A and 52B of the T groove 50, respectively. (See FIG. 4). The base ends 15A and 15B of the pressing portions 12A and 12B are located at a position where the distance between the pressing portions 12A and 12B is smaller than the distance W between the side walls 52A and 52B (see FIG. 4). It is provided in. That is, the distance C (see FIGS. 2 and 4) from the outside of the base end 15A of the pressing portion 12A to the outside of the base end 15B of the pressing portion 12B is shorter than the distance W between the side walls 52A and 52B (W> C) Yes.
The foremost portions 18A and 18B of the extended portions 16A and 16B of the pressing portions 12A and 12B extending from the top plate 11 are bent inward so as to face each other. The pressing portions 12A and 12B can be elastically deformed in a direction in which the extending portions 16A and 16B approach each other when an external force is applied.
The distal ends of the extending portions 16A and 16B adjacent to the foremost portions 18A and 18B protrude outward to a position wider than the distance W between the side walls 52A and 52B. That is, the extending portions 16A and 16B are separated from each other so that the interval between the extending portions 16A and 16B is greater than the distance W on the distal end side, and from the outermost protruding portion 17A of the extending portion 16A to the outermost of the extending portion 16B. The distance L (see FIG. 2) to the outer protrusion 17B is longer than the distance W (L> W). Further, as shown in FIG. 2, a first line LA connecting the outermost protruding portion 17A and the base end 15A and a second line LB connecting the outermost protruding portion 17B and the base end 15B have an angle θ ( (20 ° ≦ θ ≦ 30 °).
The minimum allowable dimension of the distance L from the outermost projection 17A of the extension 16A to the outermost projection 17B of the extension 16B is the maximum allowable dimension of the distance W between the side walls 52A and 52B of the T groove 50. It is configured larger. Specifically, for example, when the dimension (distance W) between the side walls 52A and 52B of the T groove 50 is 18.0 ± 0.2 mm including the tolerance required for manufacturing the groove, the T groove 50 The maximum allowable dimension is 18.2 mm. On the other hand, when the tolerance required for manufacturing the groove cover 1 by extruding aluminum is ± 0.2 mm, the minimum allowable dimension of the dimension (distance L) from the outermost protrusion 17A to the outermost protrusion 17B of the extension 16B. Is X-0.2 mm. The relationship between the minimum allowable dimension (X-0.2 mm) and the maximum allowable dimension (18.2 mm) of the T groove 50 is as follows.
(X-0.2mm)> 18.2mm
Because
X> 18.4mm
It becomes. Accordingly, under the above condition, the distance L from the outermost protruding portion 17A to the outermost protruding portion 17B of the extension 16B is set to be larger than 18.4 mm. The relationship among the distance W, the distance L, and the angle θ satisfies the following equation (1).
W ≧ L · cos (θ / 2) Formula 1
However, W <L
Next, a specific operation of the groove cover 1 according to the first embodiment will be described.
To attach the groove cover 1 to the T-groove 50 and cover the opening of the T-groove 50, first, extend the extension portions 16 </ b> A and 16 </ b> B inside the T-groove 50 while tilting the groove cover 1 with respect to the opening of the T-groove 50. Insert (See FIG. 3). Next, the groove cover 1 is pushed into the T-groove 50 so that the top plate 11 of the groove cover 1 is horizontal. At this time, the distance L from the outermost protrusion 17A of the extension 16A to the outermost protrusion 17B of the extension 16B is designed to be larger than the distance W between the side walls 52A and 52B. The portions 16A and 16B are pushed by the side walls 52A and 52B, and are pushed into the T-grooves 50 while being elastically deformed in a direction to reduce the distance L, and cover the opening of the T-grooves 50 with the top plate 11. (See FIG. 4). The extended portions 16A and 16B of the groove cover 1 pushed into the T-groove 50 and in the state shown in FIG. 4 press the side walls 52A and 52B of the T-groove 50 by the elastic restoring force. Is securely fixed to the T groove 50. In addition, since the inclined portions 14A and 14B having shapes complementary to the edge portions 51A and 51B of the T-groove 50 are formed on the lower surface of the top plate 11, it is more stably fixed to the T-groove. The opening of 50 can be reliably covered (covered). By covering the T-groove 50 formed in the machine tool with the groove cover 1 as described above, it is possible to prevent chips, tools, and the like generated during machining from dropping into the groove holes, and work efficiency. Can be improved.
When removing the groove cover 1 from the T-shaped groove 50, as shown in FIG. 5, the distal end of the removal tool 100 for removing the groove cover 1 is inserted into the small hole 20 formed in the top plate 11 and engaged therewith. Then, if the groove cover 1 is pulled out from the T groove 50, it can be easily removed.
In the first embodiment, the case where the groove cover 1 is used as the concave cover and the groove cover 1 covers the T groove 50 has been described. However, the present invention is not limited to this. In order to cover the grooves, holes, etc. of other shapes formed on the top plate 11, the shape, length, width, etc. of the top plate 11, the installation positions of the base ends 15A and 15B of the pressing portions 12A and 12B, the extension portions 16A and The length of 16B, the distance L, and the like can be arbitrarily set. However, in any case, the base ends 15A and 15B are provided on the top plate 11 at positions where the distance between the base ends 15A and 15B is smaller than the distance W between the side walls of the concave portion (for example, the T groove 50). The distance L from the outermost protruding portion 17A of the portion 16A to the outermost protruding portion 17B of the extension portion 16B satisfies the condition that the distance L is larger than the distance W.
Further, in the first embodiment, each of the pressing portions 12A and 12B is formed of one continuous substantially plate-shaped member. For example, as shown in FIG. 6, a plurality of pressing portions 112A (112B) 11 may be arranged at intervals from one another along the length direction.
The small hole 20 formed in the top plate 11 can be formed at an arbitrary position, for example, at a position close to either side of the convex edge portion 13A or 13B. (Embodiment 2)
Next, a groove cover according to a second embodiment of the present invention will be described with reference to the drawings.
7 is a front view of the groove cover according to the second embodiment, FIG. 8 is a cross-sectional view showing a state in which the groove cover shown in FIG. 7 is being attached to the T groove, and FIG. 9 is a sectional view showing the groove cover shown in FIG. It is sectional drawing which shows the state attached to the T groove.
In the second embodiment, the members described in the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
As shown in FIGS. 7 to 9, the main difference between the groove cover 2 according to the second embodiment and the groove cover 1 according to the first embodiment is that the extension portions, which are components of the pressing portions 22A and 22B. 26A and 26B.
That is, the pressing portions 22A and 22B are formed line-symmetrically with respect to the center line O 1 (see FIG. 7) of the groove cover 1 and are formed parallel to each other up to a substantially central portion of the extending portions 26A and 26B when viewed from the front. It has a shape that is separated from each other in a substantially C-shape following the parallel portion. Similarly to the pressing portions 12A and 12B, the pressing portions 22A and 22B are inserted into the T-groove 50 and press the side walls 52A and 52B, respectively. In addition, the bases 15A and 15B of the pressing portions 22A and 22B are similar to the pressing portions 12A and 12B in that the distance between the pressing portions 22A and 22B is equal to the distance W between the side walls 52A and 52B (see FIG. 9). It is provided on the lower surface of the top plate 11 at a narrower position. That is, the distance C (see FIG. 9) from the outside of the base end 15A of the pressing portion 22A to the outside of the base end 15B of the pressing portion 22B is shorter than the distance W between the side walls 52A and 52B (W> C). ing.
The substantially C-shaped portions of the extension portions 26A and 26B are formed to protrude outward to a position wider than the distance W between the side walls 52A and 52B. That is, the distance L (see FIG. 7) from the outermost protruding portion 17A of the extending portions 26A and 26B to the outermost protruding portion 17B of the extending portion 26B is longer than the distance W (L> W). As shown in FIG. 7, a first line LA connecting the outermost protruding portion 17A and the base end 15A and a second line LB connecting the outermost protruding portion 17B and the base end 15B have an angle θ ( (20 ° ≦ θ ≦ 30 °).
Further, similarly to the groove cover 1, the minimum allowable dimension of the distance L from the outermost protruding portion 17A of the extending portion 26A to the outermost protruding portion 17B of the extending portion 26B is the same as that of the groove cover 1. Is configured to be larger than the maximum allowable dimension of the distance W between the distance W and the distance 52B. Further, the relationship among the distance W, the distance L, and the angle θ satisfies the above-described formula 1 (where W <L).
Note that the groove cover 2 according to the second embodiment can also be attached to the T groove 50 in the same manner as the groove cover 1 according to the first embodiment, and cover the opening of the T groove 50. At this time, the extension portions 26A and 26B are pushed by the side walls 52A and 52B and are pushed into the T-groove 50 while being elastically deformed in a direction to reduce the distance L. Cover. (See FIG. 9). The extended portions 26A and 26B of the groove cover 1 pushed into the T-groove 50 and in the state shown in FIG. 9 press the side walls 52A and 52B of the T-groove 50 by the elastic restoring force. Is securely fixed to the T groove 50. Also, when removing the groove cover 2 from the T-shaped groove 50, the same as in the first embodiment may be performed.
【The invention's effect】
As described above, in the concave portion cover according to the present invention, a part of the extended portion of the pair of pressing portions is formed to protrude outward to a position wider than the distance between the side walls of the concave portion. When the cover is inserted into the concave portion, if the cover is inclined, the cover can be inserted into the concave portion. When the extension portions are inserted into the concave portions, the elastic portions can press the side walls of the concave portions. As a result, the recess cover can be easily attached to the recess even if the tolerance width and the dimensional error of the recess and the recess cover for covering the recess are large to some extent, and the recess is stably fixed to the recess. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view of a concave groove cover according to a first embodiment of the present invention.
FIG. 2 is an enlarged front view of the groove cover shown in FIG.
FIG. 3 is an enlarged cross-sectional view showing a state in which the groove cover shown in FIG. 1 is being attached to a T groove.
FIG. 4 is an enlarged sectional view showing a state where the groove cover shown in FIG. 1 is attached to a T groove.
FIG. 5 is an enlarged cross-sectional view showing a state in which the groove cover shown in FIG. 1 is being removed from the T groove.
FIG. 6 is a perspective view of a groove cover according to another embodiment of the present invention.
FIG. 7 is a front view of the groove cover according to the second embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a state in which the groove cover shown in FIG. 7 is being attached to the T groove.
9 is a cross-sectional view showing a state in which the groove cover shown in FIG. 7 is attached to a T groove.
[Explanation of symbols]
1, 2 Groove cover 11 Top plates 12A, 12B, 22A, 22B Pressing portions 15A, 15B Base ends 16A, 16B, 26A, 26B Extending portions 17A, 17B Outermost projecting portions 50 T-grooves 52A, 52B Side walls

Claims (8)

工作機械に形成された凹部を覆うための凹部用カバーであって、
前記凹部を覆う天板と、
前記天板から延出し、前記凹部に挿入されて当該凹部の側壁を押圧する一対の押圧部と、
を備え、
前記一対の押圧部の基端は、互いの間隔が前記押圧される側壁間の距離より狭くなる位置で前記天板に設けられ、当該一対の押圧部の延出部の一部は、前記側壁間の距離より広い位置まで外側に突出形成されている凹部用カバー。A recess cover for covering a recess formed in the machine tool,
A top plate that covers the recess,
A pair of pressing portions that extend from the top plate and are inserted into the concave portions to press the side walls of the concave portions,
With
The base ends of the pair of pressing portions are provided on the top plate at a position where the distance between the pressing portions is smaller than the distance between the pressed side walls, and a part of the extending portion of the pair of pressing portions is A recess cover that protrudes outward to a position wider than the distance between them. 前記一対の押圧部は、前記延出部の先端近傍において互いの間隔が前記側壁間の距離より広い位置となるよう、互いに離間している請求項１記載の凹部用カバー。The concave cover according to claim 1, wherein the pair of pressing portions are separated from each other such that a distance between the pressing portions near the distal end of the extending portion is wider than a distance between the side walls. 前記一方の押圧部の基端と延出部の最外突出部とを結ぶ第１の線と、前記他方の押圧部の基端と延出部の最外突出部とを結ぶ第２の線が、２０度以上、３０度以下の角度をもって交差する請求項１または請求項２記載の凹部用カバー。A first line connecting the base end of the one pressing portion and the outermost protrusion of the extension, and a second line connecting the base end of the other pressing portion and the outermost protrusion of the extension. The concave cover according to claim 1 or 2, wherein the two cross each other at an angle of not less than 20 degrees and not more than 30 degrees. 前記一方の延出部の最外突出部と、前記他方の延出部の最外突出部との距離の最小許容寸法は、前記凹部の最大許容寸法よりも大きい請求項１ないし請求項３のいずれか一項に記載の凹部用カバー。The minimum allowable dimension of the distance between the outermost protruding portion of the one extension portion and the outermost protruding portion of the other extension portion is larger than the maximum allowable size of the concave portion. The concave portion cover according to any one of the preceding claims. 前記凹部の側壁間の距離Ｗと、
前記一方の延出部の最外突出部と、前記他方の延出部の最外突出部との距離Ｌと、
前記一方の押圧部の基端と延出部の最外突出部とを結ぶ第１の線と、前記他方の押圧部の基端と延出部の最外突出部とを結ぶ第２の線とがなす角度θが、
以下に示す数式１を満たす請求項１ないし請求項４のいずれか一項に記載の凹部用カバー。
Ｗ≧Ｌ・cos（θ／２） 数式１
但し、Ｗ＜ＬA distance W between the side walls of the recess,
A distance L between the outermost protrusion of the one extension and the outermost protrusion of the other extension;
A first line connecting the base end of the one pressing portion and the outermost protrusion of the extension, and a second line connecting the base end of the other pressing portion and the outermost protrusion of the extension. Angle θ is
The concave cover according to any one of claims 1 to 4, wherein the following formula (1) is satisfied.
W ≧ L · cos (θ / 2) Formula 1
However, W <L 前記天板に、凹部溝カバーを前記凹部から取外すための取外具が係合する係合部を形成した請求項１ないし請求項５のいずれか一項に記載の凹部用カバー。The recess cover according to any one of claims 1 to 5, wherein an engagement portion with which a removal tool for removing the recess groove cover from the recess is engaged is formed on the top plate. 前記係合部は、前記天板に形成された小穴である請求項６記載の凹部用カバー。7. The recess cover according to claim 6, wherein the engagement portion is a small hole formed in the top plate. 前記凹部は、加工物を保持するテーブルに形成されたＴ溝である請求項１ないし請求項７のいずれか一項に記載の凹部用カバー。The concave cover according to any one of claims 1 to 7, wherein the concave portion is a T-shaped groove formed in a table for holding a workpiece.
JP2002372990A 2002-12-24 2002-12-24 Recessed part cover Pending JP2004202610A (en)

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JP2002372990A JP2004202610A (en) 2002-12-24 2002-12-24 Recessed part cover
US10/741,378 US7144209B2 (en) 2002-12-24 2003-12-19 Concave part cover

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CN103386627A (en) * 2013-08-07 2013-11-13 中国南方航空工业(集团)有限公司 Protective shield and lathe
KR200488840Y1 (en) 2018-10-30 2019-03-26 김상덕 Cover for t-type groove
KR200490110Y1 (en) * 2019-05-30 2019-09-26 김상덕 Reusable cover for t-type groove

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USD1046932S1 (en) 2023-11-17 2024-10-15 T-Slot Guard LLC Milling machine chip guard

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Publication number Priority date Publication date Assignee Title
CN103386627A (en) * 2013-08-07 2013-11-13 中国南方航空工业(集团)有限公司 Protective shield and lathe
KR200488840Y1 (en) 2018-10-30 2019-03-26 김상덕 Cover for t-type groove
KR200490110Y1 (en) * 2019-05-30 2019-09-26 김상덕 Reusable cover for t-type groove

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